Clo Value

The insulation value of clothing and bedding is measured in Clo units.
Much like the insulation of your house is measured in R units.

At it's most basic, 1 unit of clo value is what a person can
comfortably wear in a 70 F (21C ?) room.

Naked skin has a clo value of 0, a high loft down comforter with a
closely woven top and back has an approximate clo value of 5.

To get the clo value of a given set of clothes, you simply add the
values together. For example a T-shirt (.09) plus jeans (.25) gives a
value of .34, add socks (.02) and sneakers (.02), and at .38 clo
units you might be a little underdressed for October.

If you want to play with the math, additional basic info and a handy
dandy chart is he

http://www.engineeringtoolbox.com/cl...ion-d_732.html
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